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A Mathematical Model to Optimize the Logistic Activities in Response Phase of Earthquakes

Najafi, Mehdi | 2012

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 43905 (01)
  4. University: Sharif University of Technology
  5. Department: Industrial Engineering
  6. Advisor(s): Eshghi, Kourosh
  7. Abstract:
  8. reparedness and emergency procedure be devised in the event of,and prior to,a disaster. One of these disastersoften accompanying byhuge damages, losses and casualtiesisanearthquake. After such a disaster, several governmental and non-governmental organizations usually start relief operations. They commonly pursue their own agendas and use their own facilities and capabilities to help the people affected without pursuing a central plan. These disintegrated behaviors of involved organizations generate contradictory responses and result in either wasted resources or preventing equitable service for all affected people. Due tothe abovefact, this dissertation proposes amodel for improving earthquake emergency response. This model also allows the responders to systemize the obligations and responsibilities of the organizations involved in the response and mitigate the earthquake fatalities and casualties. One of theimportantemergency procedures discussed in the modelis the logistics plan.In order to consider these activities inthe complicatedconditionof response, disaster managers require a decision support model assisting them in efficacious usage of restricted resources during the planning horizon.Hence, thisdissertation alsoproposes a multi-objective, multi-model, multicommodity, multi-period model to manage both types of commodity and injured people logistics in thedifferent scenarios ofearthquake response phase. The scenariosdiscussed in this researchare:(A) Deterministic, in which all parameters areknow n,(B) Dynamic, in which all parameters are known,but they may alter in future,and(C) Stochastic, in which all parameters are unknown. Since the provided planin the third scenario should be robust and generic for various probable conditions; thisdissertationdevelops arobust
    approach for the proposed stochastic model, and then utilizes it to present a robust plan for logistics activities in the earthquake response. Meanwhile, because of existence of three objective functions with different priorities, thisdissertationproposes a solution methodology to solve the problem according to these priorities.Finally,a factorial design isdeveloped to investigate the effect of three factors including the network structure, hospital number and supplier number on the quality of a response plan. Investigation of the response model demonstrates that logistics planning is an important activity in response to a moderate or large scale earthquake. In addition, comparing the results acquired by the proposed modelswiththe previous ones shows that our models improve the quality of response because of its capability in considering the variety of vehicle types, modes and capabilities as well asuse of intermodal transportation.Additionally, the resultsobtained by thefactorial design show that locating a relatively large number of hospitals and suppliers with small capacities is preferred to locating few hospitals and suppliers with large capacities,because this leads to shorter waiting times for serving injured people and betterresponse toneeds. This result could help disast
  9. Keywords:
  10. Mathematical Programming ; Routing ; Robust Optimization ; Disaster Management ; Earthquake Response ; Dispatching ; Multicommodity Transportation ; Logistics Activities

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